#include "src/mc/explo/Exploration.hpp"
#include "src/mc/mc_config.hpp"
+#include <algorithm>
#include <boost/range/algorithm.hpp>
XBT_LOG_NEW_DEFAULT_SUBCATEGORY(mc_state, mc, "Logging specific to MC states");
XBT_VERB("Creating a guide for the state");
if (_sg_mc_strategy == "none")
strategy_ = std::make_shared<BasicStrategy>();
- if (_sg_mc_strategy == "nb_wait")
+ else if (_sg_mc_strategy == "nb_wait")
strategy_ = std::make_shared<WaitStrategy>();
-
- recipe_ = std::list<Transition*>();
+ else
+ THROW_IMPOSSIBLE;
remote_app.get_actors_status(strategy_->actors_to_run_);
+#if SIMGRID_HAVE_STATEFUL_MC
/* Stateful model checking */
if ((_sg_mc_checkpoint > 0 && (num_ % _sg_mc_checkpoint == 0)) || _sg_mc_termination)
system_state_ = std::make_shared<simgrid::mc::Snapshot>(num_, remote_app.get_page_store(),
*remote_app.get_remote_process_memory());
+#endif
}
State::State(RemoteApp& remote_app, std::shared_ptr<State> parent_state)
- : num_(++expended_states_), parent_state_(parent_state)
+ : incoming_transition_(parent_state->get_transition_out()), num_(++expended_states_), parent_state_(parent_state)
{
-
if (_sg_mc_strategy == "none")
strategy_ = std::make_shared<BasicStrategy>();
- if (_sg_mc_strategy == "nb_wait")
+ else if (_sg_mc_strategy == "nb_wait")
strategy_ = std::make_shared<WaitStrategy>();
+ else
+ THROW_IMPOSSIBLE;
*strategy_ = *(parent_state->strategy_);
- recipe_ = std::list(parent_state_->get_recipe());
- recipe_.push_back(parent_state_->get_transition());
-
remote_app.get_actors_status(strategy_->actors_to_run_);
- /* Stateful model checking */
+#if SIMGRID_HAVE_STATEFUL_MC /* Stateful model checking */
if ((_sg_mc_checkpoint > 0 && (num_ % _sg_mc_checkpoint == 0)) || _sg_mc_termination)
system_state_ = std::make_shared<simgrid::mc::Snapshot>(num_, remote_app.get_page_store(),
*remote_app.get_remote_process_memory());
+#endif
/* If we want sleep set reduction, copy the sleep set and eventually removes things from it */
if (_sg_mc_sleep_set) {
* And if we kept it and the actor is enabled in this state, mark the actor as already done, so that
* it is not explored*/
for (auto& [aid, transition] : parent_state_->get_sleep_set()) {
- if (not parent_state_->get_transition()->depends(&transition)) {
+ if (not incoming_transition_->depends(&transition)) {
sleep_set_.try_emplace(aid, transition);
if (strategy_->actors_to_run_.count(aid) != 0) {
XBT_DEBUG("Actor %ld will not be explored, for it is in the sleep set", aid);
strategy_->actors_to_run_.at(aid).mark_done();
}
} else
- XBT_DEBUG("Transition >>%s<< removed from the sleep set because it was dependent with >>%s<<",
- transition.to_string().c_str(), parent_state_->get_transition()->to_string().c_str());
+ XBT_DEBUG("Transition >>%s<< removed from the sleep set because it was dependent with incoming >>%s<<",
+ transition.to_string().c_str(), incoming_transition_->to_string().c_str());
}
}
}
std::size_t State::count_todo_multiples() const
{
size_t count = 0;
- for (auto& [_, actor] : strategy_->actors_to_run_)
+ for (auto const& [_, actor] : strategy_->actors_to_run_)
if (actor.is_todo())
count += actor.get_times_not_considered();
return count;
}
-Transition* State::get_transition() const
-{
- return transition_;
-}
-
aid_t State::next_transition() const
{
XBT_DEBUG("Search for an actor to run. %zu actors to consider", strategy_->actors_to_run_.size());
return -1;
}
-std::pair<aid_t, double> State::next_transition_guided() const
+std::pair<aid_t, int> State::next_transition_guided() const
{
return strategy_->next_transition();
}
+aid_t State::next_odpor_transition() const
+{
+ const auto first_single_process_branch =
+ std::find_if(wakeup_tree_.begin(), wakeup_tree_.end(),
+ [=](const odpor::WakeupTreeNode* node) { return node->is_single_process(); });
+ if (first_single_process_branch != wakeup_tree_.end()) {
+ const auto* wakeup_tree_node = *first_single_process_branch;
+ xbt_assert(wakeup_tree_node->get_sequence().size() == 1, "We claimed that the selected branch "
+ "contained only a single process, yet more "
+ "than one process was actually contained in it :(");
+ return wakeup_tree_node->get_first_actor();
+ }
+ return -1;
+}
+
// This should be done in GuidedState, or at least interact with it
-void State::execute_next(aid_t next, RemoteApp& app)
+std::shared_ptr<Transition> State::execute_next(aid_t next, RemoteApp& app)
{
// First, warn the guide, so it knows how to build a proper child state
strategy_->execute_next(next, app);
// when simcall_handle will be called on it
auto& actor_state = strategy_->actors_to_run_.at(next);
const unsigned times_considered = actor_state.do_consider();
- const auto* expected_executed_transition = actor_state.get_transition(times_considered);
+ const auto* expected_executed_transition = actor_state.get_transition(times_considered).get();
xbt_assert(expected_executed_transition != nullptr,
"Expected a transition with %u times considered to be noted in actor %ld", times_considered, next);
// 2. what action actor `next` was able to take given `times_considered`
// The latter update is important as *more* information is potentially available
// about a transition AFTER it has executed.
- transition_ = just_executed;
-
- auto executed_transition = std::unique_ptr<Transition>(just_executed);
- actor_state.set_transition(std::move(executed_transition), times_considered);
+ outgoing_transition_ = std::shared_ptr<Transition>(just_executed);
+ actor_state.set_transition(outgoing_transition_, times_considered);
app.wait_for_requests();
+
+ return outgoing_transition_;
}
+
+std::unordered_set<aid_t> State::get_backtrack_set() const
+{
+ std::unordered_set<aid_t> actors;
+ for (const auto& [aid, state] : get_actors_list()) {
+ if (state.is_todo() or state.is_done()) {
+ actors.insert(aid);
+ }
+ }
+ return actors;
+}
+
+void State::seed_wakeup_tree_if_needed(const odpor::Execution& prior)
+{
+ // TODO: Note that the next action taken by the actor may be updated
+ // after it executes. But we will have already inserted it into the
+ // tree and decided upon "happens-before" at that point for different
+ // executions :(
+ if (wakeup_tree_.empty()) {
+ if (const aid_t next = std::get<0>(next_transition_guided()); next >= 0) {
+ wakeup_tree_.insert(prior, odpor::PartialExecution{strategy_->actors_to_run_.at(next).get_transition()});
+ }
+ }
+}
+
+void State::sprout_tree_from_parent_state()
+{
+ xbt_assert(parent_state_ != nullptr, "Attempting to construct a wakeup tree for the root state "
+ "(or what appears to be, rather for state without a parent defined)");
+ const auto p = parent_state_->get_transition_out()->aid_;
+ const auto branch = std::find_if(
+ parent_state_->wakeup_tree_.begin(), parent_state_->wakeup_tree_.end(),
+ [=](const odpor::WakeupTreeNode* node) { return node->is_single_process() && node->get_first_actor() == p; });
+ xbt_assert(branch != parent_state_->wakeup_tree_.end(),
+ "Attempted to create a subtree from the wakeup tree of the parent "
+ "state using actor `%ld`, but no such subtree could be found. "
+ "This implies that the wakeup tree management is broken, "
+ "and more specifically that subtree formation is not working "
+ "as intended; for if this state was generated by the parent "
+ "having taken an action by actor `%ld`, this implies that "
+ "ODPOR found `%ld` as a candidate branch prior",
+ p, p, p);
+ this->wakeup_tree_ = odpor::WakeupTree::make_subtree_rooted_at(*branch);
+}
+
+void State::remove_subtree_starting_with(aid_t p)
+{
+ const auto branch = std::find_if(wakeup_tree_.begin(), wakeup_tree_.end(), [=](const odpor::WakeupTreeNode* node) {
+ return node->is_single_process() && node->get_first_actor() == p;
+ });
+ xbt_assert(branch != wakeup_tree_.end(), "Attempted to remove a subtree of this state's "
+ "wakeup tree that does not exist");
+ this->wakeup_tree_.remove_subtree_rooted_at(*branch);
+}
+
} // namespace simgrid::mc
